Useful Links

Official Arduino Website

Inventr.io - Free Courses | Inventre.io - 30 Day Challenge - Fun tutorial/courses

Random Nerd Tutorials - Free resources/activities/tutorials

Sparkfun - Free resources/activities/tutorials

Hackster - Free resources/activities/tutorials

Arduino 101 - Learn Arduino for Beginners - YouTube play list - A focus on the programming of an Arduino

Arduino Masterclass - YouTube - Full Programming Workshop in 90 minutes

Basic Electronics for Beginners in 15 steps - YouTube - Introduction to basic electronics

Electrical Electronics Applications - YouTube Channel - Variety of videos and playlists covering electronics and Arduino

Electrical Electronics Applications - YouTube Channel - Specific playlist for Arduino covering short videos on a lot of components, with diagrams and code

https://app.mindmup.com/map/new

https://cloud.smartdraw.com/

https://app.diagrams.net/

https://miro.com/flowchart/

https://www.youtube.com/@AskGamedev

Pixlr

Photopea

Image Splitter 

Remove Backgrounds

Hour of Code

Repl.it

Codecademy

W3Schools

Flutter

Grok Learning

Most of the following resources provide a free version.  Each tool offers different features.  You should look for KANBAN and Gantt functionality as a minimum.

https://trello.com/

https://asana.com/

https://clickup.com/

https://www.wrike.com/

https://www.airtable.com/

https://www.atlassian.com/software/jira

https://www.teamgantt.com/

https://www.onlinegantt.com/#/gantt

https://www.bitrix24.com/

https://todoist.com/

https://www.meistertask.com/

https://runrun.it/en-US

https://goodgantt.com/

Ecrett Music Creation

She Sharp